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  1. World War I - Wikipedia

    The Bolsheviks signed an armistice followed by a separate peace shortly after their armed seizure of power. ^ Often abbreviated as WWI or WW1 ^ Only the Triple Alliance was a formal …

  2. World War I - Encyclopedia Britannica

    10 hours ago · World War I (1914–18) was an international conflict that embroiled most of the nations of Europe along with Russia, the U.S., the Middle East, and other regions. It led to the …

  3. World War I: Summary, Causes & Facts | HISTORY

    Oct 29, 2009 · French soldiers in Verdun endure the horrors of trench warfare, a strategy that led to rampant disease, shell shock and mass casualties during WWI.

  4. Timeline (1914 - 1921) | A World at War - Library of Congress

    Collection Stars and Stripes: The American Soldiers' Newspaper of World War I, 1918 to 1919

  5. The Causes of WWI - World History Encyclopedia

    May 15, 2025 · The three main causes of WWI were Germany's imperialist ambitions, a rise in nationalist independence movements in the Balkans, and a complex network of international …

  6. World War I Centennial - National Archives

    Aug 23, 2022 · Gun crew from Regimental Headquarters Company, 23rd Infantry, firing 37 mm gun during an advance on German entrenched positions. View in Catalog. As the largest …

  7. World War I | Britannica

    World War I: To its contemporaries, it was known simply as "the World War" or "the Great War," because it was nearly impossible to imagine a conflict that would surpass the one that …

  8. Six Causes of World War I - Norwich University Online

    Though the assassination of Archduke Ferdinand was the direct precipitating event leading to the declaration of war, there were many other factors that also played a role in leading up to World …

  9. World War I: Causes and Timeline | HISTORY

    World War I—also known as the Great War—pitted Germany, Austria-Hungary and the Ottoman Empire against Great Britain, the United States, France, Russia, Italy and Japan. New military ...

  10. US Involvement in WWI - World History Encyclopedia

    Oct 15, 2025 · US Infantry Soldier, WWI The National Guard (CC BY) A Rising Neutral Power In the early 20th century, the United States was challenging Great Britain as the richest and most …